203020100100 has 54 divisors (see below), whose sum is σ = 636355227690. Its totient is φ = 54138693120.

The previous prime is 203020100089. The next prime is 203020100123. The reversal of 203020100100 is 1001020302.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 69730852356 + 133289247744 = 264066^2 + 365088^2 .

It is a super-2 number, since 2×203020100100² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 112788045 + ... + 112789844.

Almost surely, 2^203020100100 is an apocalyptic number.

203020100100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203020100100 is an abundant number, since it is smaller than the sum of its proper divisors (433335127590).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

203020100100 is a wasteful number, since it uses less digits than its factorization.

203020100100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225577909 (or 225577899 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

Adding to 203020100100 its reverse (1001020302), we get a palindrome (204021120402).

The spelling of 203020100100 in words is "two hundred three billion, twenty million, one hundred thousand, one hundred".